Field-scale relationships among soil properties and shallow groundwater quality.

It is important to understand the link between land surface/soil properties and shallow groundwater quality. To that end, soil properties and near-water-table groundwater chemistry of a shallow, unconfined aquifer were measured on a 100-m grid on a 64-ha irrigated field in southeastern North Dakota. Soil properties and hydrochemistry were compared via multivariate analysis that included product-moment correlations and factor analysis/principal component analysis.

Nitrate Contamination from Dairy Lagoons Constructed in Coarse Alluvial Deposits.

In an effort to reduce surface inflows of nutrients to Deer Creek Reservoir in north central Utah, several dairies in Heber Valley constructed unlined lagoons to store wastes for later application onto fields as fertilizer. Previous research indicated that dairy lagoons sealed with use and were not significant sources of contamination; however, the soils in Heber Valley are coarser than in the literature. Therefore, two of Heber Valley's dairy lagoons were studied as sources of NO -N to the groundwater system.